Installing Tiger from Download

Ok, I downloaded Tiger from the Apple Developer section so I know have tiger_8a228_userdvd.dmg on my desktop. I open it and see the install icon. When I click that it tells me to click restart to restart the computer and start the install process. I click restart but the install doesn't start. I then read the install directions which tell me I can also set it to open on start up in my system settings, I do that and restart and it doesn't start the install process.....how can I install Tiger from this download???